26 results about "Salinity stress" patented technology

The invention discloses a planting optimization method and system based on crop yield estimation in a saline-alkali land area, and relates to the field of crop yield prediction and planting optimization, and the method comprises the steps: data collection and fusion processing; performing dynamic prediction on soil water and salt migration, and realizing water and salt space-time distribution prediction by adopting a space-time cubic modeling self-adaptive model combined with physical correction; crop salt tolerance modeling: establishing a multi-interval salt tolerance model based on physiological response fitting and threshold segmentation, and introducing covariable correction; carrying out migration salt tolerance coupling modeling, introducing a salinity memory factor and a stage sensitivity regulation factor, and dynamically simulating growth response of crops under salinity stress; and crop yield estimation and planting optimization: generating a regional yield prediction and sowing configuration scheme based on coupling model output, and forming an optimization strategy in combination with measures such as irrigation and fertilization. According to the method, model-driven integrated optimization from yield estimation to planting decision of crops in the saline-alkali region is realized, and the method has high precision and wide applicability.

The invention provides a rice growth model construction method and system based on salt stress, and relates to the technical field of growth model.The rice growth model construction method comprises the steps that firstly, monitoring points are arranged in a planting sample area, and soil conductivity data of different depths are obtained through a multi-depth soil conductivity sensor and a Kriging interpolation method; collecting root system density, a multispectral remote sensing image and a leaf area index, and calculating a canopy salt stress index; measuring the concentration of related ions to obtain a sodium adsorption ratio, and establishing a salt stress coefficient by combining the soil conductivity and the irrigation volume; fusing canopy and soil stress indexes to generate a stress comprehensive index, and introducing a salinity feedback item to represent the crop compensation capability; and finally, constructing a hybrid machine learning model by adopting a convolutional neural network and a long-short-term memory network to realize rice growth dynamic prediction. According to the method, multi-dimensional salinity stress quantification of a soil-crop system is realized, and decision support is provided for salinization treatment in precision agriculture.

The invention provides a rapid evaluation method and system for the soil fertility level, and relates to the technical field of soil fertility detection.The rapid evaluation method comprises the steps that an original absorbance spectral data curve is obtained by scanning a soil sample, the moisture peak absorbance, the actual peak position wavelength and the moisture synthetic frequency characteristic peak width are extracted, and a spectral data basis is provided; a water-salt optical path coupling factor is calculated, water-salt correction operation is carried out in combination with a volume correction coefficient, a virtual dry soil spectrum data curve is obtained, interference of salt on a water optical path is quantified, and a water background and salt masking are eliminated; constructing a characteristic virtual baseline of the organic matter and the total nitrogen, calculating an integral area to obtain characteristic intensity of the organic matter and the total nitrogen, and providing a physical input variable for quantitative inversion; introducing a water-salt optical path coupling factor to invert the organic matter content and the total nitrogen content, and correcting signal depression caused by salt stress; the effective fertility index is calculated and graded by combining the organic matter content and the total nitrogen content of the soil, and the actual fertilizer supply capacity of the soil is comprehensively evaluated.

The invention provides schizochytrium limacinum FJ-1 and application thereof in production of phospholipid type EPA (eicosapentaenoic acid). The application comprises the following steps: taking a cryopreserved schizochytrium limacinum strain, and inoculating the schizochytrium limacinum strain into a liquid seed culture medium for pre-culture; the method comprises the following steps: inoculating pre-cultured schizochytrium limacinum into a fermentation tank according to the inoculum size of 5-10% v / v, culturing for 48-60 hours at the sea salt concentration of 0.5-1% w / v, fermenting for 48-72 hours, supplementing sea salt to a culture medium in batches until the sea salt concentration is 3-5% w / v, and continuously culturing for 96-120 hours by controlling the glucose concentration and the yeast extract concentration through supplementing materials. The technical problem that the synthesis efficiency of schizochytrium limacinum phospholipid type EPA is low is solved through precise regulation and control of salinity stress, an efficient, economical and generalizable innovative scheme is provided for industrial production of functional lipid, and the method is suitable for large-scale production.

The invention relates to the technical field of agricultural engineering, in particular to a water and fertilizer regulation and control method and system for saline-alkali soil grain-fed crops, and the method comprises the following steps: S1, synchronously obtaining soil salinity concentration, soil moisture content and available nitrogen concentration; s2, calculating a salinity stress index, and dividing stress levels; s3, if the soil moisture content is lower than the preset crop suitable lower limit, the irrigation compensation amount is increased; if the soil moisture content is normal, the pulse irrigation mode is adjusted according to the stress level; s4, the nitrogen fertilizer notch amount is calculated according to comparison between the available nitrogen concentration in the S1 and the nitrogen demand threshold value in the crop growth stage; and S5, dynamically adjusting the fertilizer injection concentration and the irrigation duration in the water and fertilizer integrated application. By monitoring soil parameters in real time and dynamically adjusting water and fertilizer supply, accurate regulation and control of water and fertilizer of saline-alkali soil crops are achieved, the utilization efficiency of the fertilizer is improved, the growth environment of the crops is optimized, and resource waste and environmental pollution are reduced.

The invention belongs to the technical field of molecular biology, and discloses an SNP (Single Nucleotide Polymorphism) marker related to the salt tolerance character of micropterus salmoides and application of the SNP marker. According to the invention, correlation analysis is carried out on the extreme salinity tolerance of the micropterus salmoides and the salt tolerance of sensitive individuals, so that the SNP molecular marker related to the salt tolerance of the micropterus salmoides is obtained. The SNP molecular marker is shown as SEQ ID NO: 1, the SNP site is located at the 501st site, and three genotypes of TT, TG and GG exist. Wherein the survival time of the micropterus salmoides with the GG genotype under salinity stress is obviously higher than that of the micropterus salmoides with TG and TT genotypes. By detecting the genotype of the SNP molecular marker, the parent of the micropterus salmoides with strong salt tolerance can be accurately selected, and the SNP molecular marker can be effectively used for molecular marker-assisted breeding of the micropterus salmoides.

The invention discloses a high-salinity desert region pioneer vegetation rapid planting method based on salinity gradient regulation and control, and relates to the technical field of vegetation planting. The method can effectively regulate and control gradient distribution of salinity in the high-salinity desert region, reduce salt stress of a root zone, improve the seed germination rate and the seedling survival rate of pioneer vegetation, effectively inhibit surface salinity accumulation and optimize moisture distribution, thereby promoting rapid field planting and healthy growth of vegetation; by constructing a stable salinity gradient and moisture regulation and control system, through a micro-irrigation system and a mixed matrix layer, the moisture utilization efficiency is optimized, the fresh water consumption is reduced, the vegetation coverage is improved, the soil erosion risk can be reduced, the stress resistance of an ecological system is enhanced, and the vegetation coverage is rapidly improved in a short time; finally, the desert region is promoted to succession towards a multi-layer and stable arbor-shrub-grass community structure, the soil fertility and the microclimate environment are improved, the stability and the wind erosion resistance of an ecological system are enhanced, and reliable technical support is provided for sustainable ecological restoration.

The invention provides a blue crab saline-alkali soil seedling desalination and domestication interactive training system, a salinity regulation and control model optimization method, equipment and a medium, a dynamic physiological response model is obtained by establishing a blue crab seedling salinity stress response model and performing parameter estimation and calibration based on actual breeding data; carrying out global sensitivity analysis according to the dynamic physiological response model, and determining a physiological tolerance interval of key regulatory factors related to the desalination and domestication salinity of the juvenile green crabs; carrying out numerical optimization calculation by taking the daily decreasing amplitude of salinity and the stage stable time as decision variables and the maximization of the survival rate of the fries as an optimization target to obtain an optimal combination; and determining an optimal target salinity set value of each desalination stage according to the physiological tolerance interval and an optimization result, and constructing a gradient desalination regulation and control strategy. By adopting the scheme of the application, the optimization of the salinity regulation model can be realized, and the stability and the efficiency of desalination and domestication of the young green crabs are improved.

The present invention provides a method and system for constructing a rice growth model based on salt stress, relating to the technical field of growth model construction. The method first sets up monitoring points in a planting sample area and obtains soil conductivity data at different depths using multi-depth soil conductivity sensors and the Kriging interpolation method. Root density, multispectral remote sensing imagery, and leaf area index are collected to calculate the canopy salt stress index. The sodium adsorption ratio is determined by measuring relevant ion concentrations, and a salt stress coefficient is established by combining soil conductivity and irrigation volume. The canopy and soil stress indicators are integrated to generate a comprehensive stress index, and a salt feedback term is introduced to characterize crop compensation capacity. Finally, a hybrid machine learning model is constructed using a convolutional neural network and a long-short-term memory network to achieve dynamic prediction of rice growth. The present invention achieves multidimensional salt stress quantification in the soil-crop system, providing decision support for salinization control in precision agriculture.

The application provides a soil fertility level rapid evaluation method and system, relates to the soil fertility detection technical field, and provides the spectrum data basis through scanning soil samples to obtain the original absorbance spectrum data curve and extracts the water peak value absorbance, the actual peak wavelength and the water combined frequency characteristic peak width; calculates the water salt optical path coupling factor and carries out water salt correction operation to obtain the virtual dry soil spectrum data curve in combination with the volume correction coefficient, quantifies the interference of the salt on the water optical path and eliminates the water background and the salt masking; the characteristic virtual baseline of organic matter and total nitrogen is constructed, and the integral area is calculated to obtain the characteristic intensity of organic matter and total nitrogen, so that physical input variables are provided for quantitative inversion; the water salt optical path coupling factor is introduced to invert the organic matter content and the total nitrogen content, the signal suppression caused by the salt stress is corrected; the effective fertility index is calculated in combination with the organic matter content and the soil total nitrogen content, and is classified, so that the comprehensive evaluation of the actual fertilization capacity of the soil is realized.

The invention provides a method for improving the muscle quality of channel catfish through short-term salinity stimulation, and relates to the technical field of aquaculture. According to the method, in the later period of channel catfish breeding or before channel catfish processing, a fish body is transferred into a salinity-controllable water body to be subjected to short-term salinity treatment; through three stages of slowly increasing salt, maintaining high salinity and reducing salt, in combination with parameter control of water temperature, dissolved oxygen, pH and the like, fish bodies are subjected to salinity stress, and a physiological regulation mechanism is started. And transferring the treated fish body into fresh water for temporary rearing. Results show that the method significantly reduces the muscle water content of channel catfish, increases the contents of protein, unsaturated fatty acid and flavor amino acid, and enhances the muscle hardness and flavor quality. The method is simple and easy to implement and can be implemented in the later period of conventional breeding, and the meat nutritional value and sensory quality of the channel catfish are effectively improved.

This invention discloses a device and method for simulating the effects of salinity stress during freeze-thaw cycles on the rhizome germination of emergent plants, belonging to the field of emergent plant germination experiments in cold and arid regions. The device includes an outdoor main pool and a laboratory auxiliary pool, connected by a closed channel with double gates. The bottom of the main and auxiliary pools is equipped with sliding tracks and transfer channels. Within the transfer channels, a translation screw, in conjunction with an electromagnet, drives the base frame to move without breaking ice. The main pool is equipped with freeze-thaw, salinity, and nutrient regulation modules. The method uses an L18 (3²×6¹) orthogonal array to design experimental combinations of freeze-thaw patterns, salinity, and nutrients. The base frame is transferred to the auxiliary pool without breaking ice, and stratified morphological and physiological indicators are measured simultaneously. Data are harvested at the end of the experiment, and variance analysis is performed. This invention achieves undisturbed monitoring of the experimental environment, accurately recreates the complex stress environment, quantifies the effects of the three factors, provides a scientific basis for the ecological restoration of saline-alkali wetlands, and is convenient to operate and highly repeatable.

The present application relates to the technical field of resource management, in particular to a vegetation water requirement prediction method and system for sea embankment ecological protection, comprising collecting environmental monitoring data of the sea embankment area; a salt stress factor model is established based on soil data to calculate the comprehensive salt stress coefficient of the monitoring point, dynamically correct the vegetation water requirement based on multiple factors, and obtain the basic vegetation water requirement; a multi-dimensional time sequence model considering the relationship between the tidal cycle and soil water replenishment is established to obtain resource scheduling weights under different tidal stages and environmental conditions; based on the vegetation data, underground data and environmental data of different sea embankment areas, a water resource allocation network based on multi-region cooperation is used to obtain a distribution optimization scheme based on regional characteristic parameters; the basic vegetation water requirement, resource scheduling weights and distribution optimization scheme are comprehensively used to generate vegetation water requirement prediction results and hierarchical resource scheduling schemes for irrigation.

The application discloses a kind of based on saline-alkali region crop yield estimation and planting optimization method and system, it is related to crop yield prediction and planting optimization field, this method includes: data acquisition fusion processing;Soil water salt migration dynamic prediction, realizes water salt space-time distribution prediction using the space-time cubic modeling adaptive model combined with physical correction;Crop salt tolerance modeling, based on physiological response fitting and threshold segmentation establishes multi-interval salt tolerance model and introduces covariant correction;Migration salt tolerance coupling modeling, introduce salt memory factor and stage sensitivity control factor, dynamically simulate the growth response of crop under salt stress;Crop yield estimation and planting optimization, based on coupling model output generation regional yield prediction and sowing configuration scheme, and form optimization strategy in combination with irrigation fertilization and the like measure.This application realizes the model-driven integrated optimization of crop in saline-alkali area from yield estimation to planting decision, with high precision and wide applicability.

The present invention provides a method, medium and system for assessing the ecological environment damage value of Spartina alterniflora, belonging to the technical field of Spartina alterniflora ecological environment damage assessment. The present invention introduces an ecological damage diffusion equation to describe the propagation coupling mechanism of multiple factors, utilizes a spatiotemporal damage analysis model based on a graph convolutional network to process complex factor interactions, establishes a time weight factor correction model to quantify the dynamic changes of cumulative effects, combines a biological inhibitor effect model to analyze the synergistic effects of multiple inhibition mechanisms such as local reed competition, natural enemy insect control, and salt stress, and achieves accurate damage quantification and prevention and control strategy formulation through a regional ecological environment damage value comprehensive assessment model and an inhibitor optimization configuration model, thereby solving the technical problem that the existing technology cannot effectively analyze the interaction mechanism of multiple ecological factors during the invasion of Spartina alterniflora, resulting in insufficient accuracy in ecological damage value assessment.

The invention discloses a device and a method for simulating influence of salinity stress in freezing and thawing periods on germination of rhizomes of emergent aquatic plants, and belongs to the field of germination experiments of emergent aquatic plants in cold and arid regions. The device comprises an outdoor main pool and a research laboratory auxiliary pool which are communicated through a closed channel with double gates, the bottoms of the main pool and the auxiliary pool are provided with sliding ways and moving ways, and translation lead screws in the moving ways are matched with electromagnets to drive a base frame to move without icebreaking; and the main pond is matched with a freeze thawing, salinity and nutritive salt regulation and control module. According to the method, an L18 (3 * 6) orthogonal table is adopted to design a freeze-thaw mode, salinity and nutritive salt three-factor experimental combination, a base frame is transferred to an auxiliary pool without icebreaking, layering morphology and physiological indexes are measured synchronously, harvesting is conducted at the last stage of an experiment, and data variance analysis is conducted. According to the invention, undisturbed monitoring of the experimental environment is realized, the composite stress environment is accurately restored, the three-factor effect is quantified, a scientific basis is provided for ecological restoration of the saline-alkali wetland, the operation is convenient, and the repeatability is high.

The invention discloses a coastal wet-water saline-alkaline area paddy-upland rotation soil water-salt-carbon-fertilizer coordinated regulation and control method, which comprises the following steps: (1) constructing an open trench + concealed conduit + monitoring network three-dimensional drainage salt control system to realize zoned active salt control; (2) adopting an intermittent tillage system based on soil texture, and optimizing a plough layer structure through combination of periodic deep tillage and conventional rotary tillage; (3) performing straw zoned returning, constructing a deep salt-resistant layer in the deep tillage year, and quickly increasing organic matters in a plough layer in the rotary tillage year; (4) applying biologically active and stable carbon sources in a compatible manner, and determining the carbon input amount according to the salinity level, so as to realize directional fertilization and carbon library compatibilization; and (5) implementing a nitrogen-increasing fertilization strategy adaptive to salt stress, and realizing efficient utilization of nitrogen in combination with urease and a nitrification inhibitor. Through cooperation of multiple links, the productivity and sustainability of the coastal saline-alkali land paddy-upland rotation system are systematically improved.

The present application relates to a kind of farmland root layer soil salt content inversion method and application based on remote sensing data fusion.Different from other remote sensing inversion method can only roughly estimate surface soil salt content, the present application is based on the influence mechanism of crop growth period root layer soil salt on transpiration and evapotranspiration, using the relationship between relative evapotranspiration rate and soil salt stress correction coefficient to establish root layer soil salt content remote sensing inversion model, based on remote sensing image data fusion with different temporal and spatial resolution, inversion obtains the spatial distribution rule of root layer soil salt on regional scale, and combines with the temporal and spatial evolution rule of remote sensing image data analysis for many years.The application of the present application technology can enrich soil water and salt transport theory, perfect remote sensing monitoring method, also can help to deeply understand the temporal and spatial evolution rule of regional scale farmland evapotranspiration rate and root layer soil salt and its driving mechanism, for optimizing planting structure and water and soil resource allocation, promote the sustainable development of saline-alkali agriculture and provide new means and scientific basis for protecting ecological environment.

The invention belongs to the technical field of fish salt tolerance, and particularly relates to a grass carp salt tolerance evaluation method and application thereof. The serum prolactin concentration is used as the hormone molecular marker for measuring the salt tolerance of the grass carp. Under the stress of the same intensity of salinity, the higher the concentration of serum prolactin is, the stronger the salt tolerance is. In the breeding process of the grass carp salt-tolerant strain, the serum prolactin concentration of the screening material under the saline stress condition can be measured, and the salt tolerance of the grass carp can be accurately evaluated. When the method is applied to breeding practice, the breeding efficiency of the salt-tolerant grass carp new variety in the breeding process is greatly improved, and the breeding period of the salt-tolerant grass carp variety is remarkably shortened.

The invention provides a forest waste biochar base fertilizer for coastal low-lying land soil improvement, which is characterized in that biochar with different characteristics is prepared through a directional carbonization process by utilizing the difference of tree wastes such as leaves, barks and branches in fiber density and chemical composition, and pseudomonas putida and montmorillonite are respectively loaded according to the porosity difference. Layered matching is carried out according to requirements of soil layers, the physical structure of soil is effectively improved, hardening and salt stress are relieved, meanwhile, the long-acting slow-release characteristic is achieved, the nutritional requirements of taxodium orientalis seedlings in the whole growing season can be continuously met, overground part growth and root development of taxodium orientalis can be effectively promoted, and the survival rate of taxodium orientalis seedlings is increased. And a green, economic and sustainable technical approach is provided for ecological restoration and vegetation reconstruction of the coastal saline-alkali land.

Methods and systems for remote detection of growth conditions of a plant species. In a particular implementation, the present invention provides improved techniques for identifying one or more stress conditions in plants, including without limitation, drought stress, temperature stress, salinity stress and other conditions in a plant species. An example implementation assesses both steady-state chlorophyll fluorescence and green light reflectance of a plant species in real-time. A controller may detect drought and / or other stress conditions by comparing the respective signal trajectories of observed chlorophyll fluorescence and green light reflectance.

The application discloses a method for evaluating the growth performance of mangrove seedlings in a high-salinity environment of an estuary, constructs an analysis framework of a dynamic salinity stress system coupled with multidimensional monitoring technology, and realizes accurate evaluation of the environmental adaptability of the mangrove seedlings. First, aseptic germination and substrate domestication are carried out on a target estuary seed source, then a three-dimensional stress model including basic salinity maintenance, sudden salinity impact and tidal cycle fluctuation is established, the amplitude of the sudden salinity impact is strictly controlled within 20% of the historical extreme value of the estuary, three-dimensional laser scanning technology is used to synchronously obtain the crown volume and root configuration parameters of the seedlings, and a morphological database is constructed in combination with leaf apparent characteristic records; through transmission electron microscope observation, subcellular structure indexes such as cell wall thickening, chloroplast membrane integrity and mitochondrial ridge density are analyzed, the molecular mechanism of osmotic regulation and energy metabolism is revealed, and the water body suspended matter concentration, sediment oxidation-reduction potential and microbial functional diversity are synchronously monitored.

The invention provides a stress-resistant seedling-raising special fertilizer. The stress-resistant seedling-raising special fertilizer is prepared from the following components in parts by weight: 345 to 390 parts of urea, 190 to 310 parts of ammonium nitrate phosphorus, 90 to 115 parts of monoammonium phosphate, 160 to 185 parts of potassium sulfate, 18 to 33 parts of mineral source potassium fulvate, 16 to 27.5 parts of trace elements, 2.5 to 7 parts of amino acid polypeptide, 42 to 68 parts of anhydrous magnesium sulfate, 0.1 to 0.3 part of plant endophyte metabolite and 0.2 to 0.4 part of stress-resistant supplement. The invention also provides a production method of the stress-resistant seedling-lifting special fertilizer. The plant endophyte metabolite is added to enhance the stress resistance of plants. Meanwhile, the alginate oligosaccharide is matched, so that the alginate oligosaccharide and the alginate oligosaccharide cooperate with each other, and under various stress conditions (water stress, salt stress, osmotic stress and pH change), the metabolism of the plant is promoted, and the adversity stress resistance of the plant is improved.

The application relates to the technical field of wastewater treatment, and discloses a high-salinity wastewater treatment method and device for realizing granulation of bacteria-algae and synergistic denitrification, the method comprising the following steps: placing microalgae and aerobic granular sludge in a photobioreactor for initial culture; after the initial culture, adding magnetic iron oxide nanoparticles into the photobioreactor for reinforced culture to obtain bacteria-algae symbiotic aerobic granular sludge; and using the bacteria-algae symbiotic aerobic granular sludge for denitrification treatment of wastewater. By adding magnetic iron oxide nanoparticles in the growth process of bacteria-algae, the application can effectively solve the problems of slow aggregation and nucleation of bacteria-algae in the ABGS formation process, low activity of algal cell photosynthetic electron transport and decreased denitrification efficiency under high-salinity stress, and can simultaneously reinforce the rapid aggregation and nucleation of bacteria-algae, improve the photosynthetic system electron transport efficiency of algal cells under high-salinity stress, and improve the denitrification efficiency of microorganisms.

The application provides a mud crab salt marsh seed desalination domestication interactive training system, a salinity regulation model optimization method, equipment and a medium. A mud crab seed salinity stress response model is established, and parameter estimation and calibration are performed based on actual cultivation data to obtain a dynamic physiological response model. Global sensitivity analysis is performed according to the dynamic physiological response model to determine the physiological tolerance interval of key regulation factors related to mud crab seed desalination domestication salinity. Numerical optimization calculation is performed with salinity daily drop and stage stable time as decision variables and maximum seed survival rate as an optimization objective to obtain an optimal combination. The optimal target salinity setting value of each desalination stage is determined according to the physiological tolerance interval and the optimization result, and a gradient desalination regulation strategy is constructed. The scheme of the application can optimize the salinity regulation model and improve the stability and efficiency of mud crab seed desalination domestication.